Albert d



(No Model.)

A. D. LAWS.

MACHINE PORPUNGHING METALLIG'STRAP BANDS. No. 330,337.

Patented Nov. 10, 1885.

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WNITLED STATES PATENT Orrrcn.

ALBERT D. LAWS, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR OF ONE-HALF TOGEORGE DOOLITTLE, OF SAME PLACE.

MACHINE FOR PUNCHING METALLIC STRAP-BANDS.

EPECIFICATION forming part of Letters Patent No. 330,337. dated November10,1885.

Application filed February 6, 1885. Serial No. 155,077.

.To all whom it may concern:

Be it known that I, ALBERT D. Laws, a citizen ofthe United States,residing at Bridgeport, in the county of Fairfield and State ofConnecticut, have invented certain new and useful Improvements inMachines for Piercing Metallic Strap-Bands; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

My invention relates to certain novel and useful improvements in theprocess of breaking or forming apertures or holes in metal strapbandsfor the reception of the fasteningnails, and also in machines foraccomplishing this purpose, and has for its object to preparestrap-bands forimmediate use, so that the workman will not be obliged topunch the apertures as fast as he drives the nails, and, furthermore, toaccomplish this result speedily and economically; and with these ends inview my invention consists in the details of construction andcombination of elements hereinafter fully explained, and thenspecifically designated by the claims.

In order that those skilled in the art to which my invention appertainsmay more fully understand its construction, I will proceed to describethe same in detail, referring by letter to the accompanying drawings,forming a part of this specification, in which- Figure l is a sideelevation of a machine constructed to effect the desired object; Fig. 2,a front elevation of the same with means for cutting the bands attachedthereto; Fig. 3, a plan View of a strap-band after it has been runthrough the machine, and Fig. 4 a front elevation of a modification ofthe machine.

Similar letters denote like parts in the several figures of thedrawings.

A is any base or bed adapted to support the working parts of themachine, and B are uprights or standards, of metal, which are boltedsecurely to bed A. The inner edges of each of the uprights are madeV-shaped in crosssection, for the purpose hereinafter set forth. In theupper portion of the standards is journaled a flat-faced wheel, D,having in the center of the face thereof a circumferential (No model.)

groove, E. Fitting within the standards are blocks F,having V-shapedgrooves in theirlateral edges to accommodate the angular edges of thestandards, and between the bottoms of 5 these blocks and the base areplaced plate bowsprings G, supporting said blocks. J ournaled in blocksF is a shaft. H, having rigidly secured thereon between the standards afiat-faced wheel, I, having upon its face at regular inter- 6o valswedge-shaped spurs J, in the same vertical plane with groove E. Upon oneend of the shaft His secured a crank-lever, K, and upon the other is aface-cam, L.

M is a bell-crank lever pivoted to the upper extremity of one of thestandards, and with the lower edge of its upper portion made with ashear-edge.

N is a stationary shear-jaw, cast with or secured to the standard. bythe action of the face-cam L against the lower extremity of the lever M.i

O are guides adjustably secured within the standards by means of screwsP.

The jaws are operated Q is a spiral spring extending between the 7 5standards and the lever M, and its function is to open the shears afterthe face-cam L has ceased to operate against the lever.

The operation of my improvement is as follows: The strips to be operatedupon are fed 8c in between the guides O to the meeting edges of thewheels, whose revolution, by means of the crank, draws the metal inbetween them. As the spurs successively come in contact with the strip,they force themselves into it, breaking the fiber, thus forming adepression with a small orifice at the bottom, through which an ordinarynail may readily be driven. The shears mounted upon the standard aremerely for convenience in cutting off the strips when 0 which embracethe edges of said lower wheel. roo

Said upper wheel is furnished, in lieu of the central circumferentialgroove, with a series of indentations, S, corresponding in position tothe spurs, and with which the latter will mesh. To insure this meshing,the outer ends of the shafts are furnished with engaginggears T, ofequal size, whose purpose is simply to control and secure a steady anduniform rotation of the wheels.

I do not wish to confine myself to any particular operating mechanism,the gist of my invention resting in the broad idea of adaptingstrap-bands for nailing by means of the action of dies.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In combination with the wheels, jour naled as described, theadjustable guides secured to the uprights and controlled by means ofscrews P,substantially as described.

2. The combination of the upper wheel, D, 20 journaled in the standardsand having groove E, lower wheel, I, mounted on axle H, and having spursJ,b10cks F, supported by springs G, and in which axle H is journaled,and guides O, adjust-ably secured in the standards, 25 substantially asdescribed.

In testimony whereof I aflix my signature in presence of two witnesses.

ALBERT D. LAWS.

Witnesses:

S. S. WILLIAMSON, W. T. HAVILAND.

